Tool Offset Functions; Tool Offset Data Memory; Tool Length Offset (G43, G44, G49) - Siemens SINUMERIK 802D sl Programming Manual

04.07
3.5

Tool offset functions

3.5.1

Tool offset data memory

Since Siemens and ISO Dialect programs are to run alternately on the control, the
implementation must use the Siemens tool data memory. The length, geometry
and wear are therefore available in each offset memory. In Siemens mode, the off-
set memory is addressed by T (tool number) and D (tool edge number), abbrevia-
ted to T/D number.
In ISO Dialect programs, the offset number is addressed by D (radius) or H
(length), referred to below as D/H number.
In order to establish a unique assignment between the D or H number and a T/D
number, an element $TC_DPH[t,d] has been added to the offset data set. The D/H
number of the ISO Dialect is entered in this element.
Table 3-10
T
1
1
1
2
2
2
Setting data $SC_TOOL_LENGTH_CONST must contain the value 17 for the as-
signment of tool length offsets to geometry axes to be independent of the plane
selection. Length 1 is then always assigned to the Z axis.
3.5.2

Tool length offset (G43, G44, G49)

The tool length offset function adds or subtracts the amount stored in the tool off-
set data memory to or from the Z coordinate values specified in a program to offset
the programmed paths according to the length of a cutting tool.
Commands
In the execution of the tool length offset function, addition or subtraction of the off-
set data is determined by the specified G code and the direction of offset by the H
code.
G Codes used for tool length offset
The tool length offset function is called by the following G codes.
© Siemens AG 2007 All rights reserved
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) - - 04.07 Edition
Example: tool offset data set
D/cutting edge
1 10
2 11
3 12
1 13
2 14
3 15
Movement Control Commands
3.5 Tool offset functions
ISO_H Radius
$TC_DPH
Length
3-73